Toshiba Laptop Boot Problem

Im not exactley sure of all the specs on the computer but heres whats been going on. As far as i can see the computer is totally stock. When i boot it only gets as far as past the first Toshiba splash screen before it wont go any further. It just sits there with the cursor blinking in the upper left hand corner. When i put in the windows disc to Re-install it boots the disc and then says checking system hardware and then it just sits there at a blank screen. I went into the Bios and made sure it detected the HDD. I cant seem to figure out whats wrong. Any help would be greatly appreciated.